Hydrocarbon generation modelling in the Permian and Triassic strata of the Polish Basin: implications for hydrocarbon potential assessment

Main Do lo mite reached val ues ap proach ing 100% along the ba sin axis. The TR in the Up per Tri as sic source rocks is gen er ally lower than in the Zechstein Main Do lo mite due to lesser burial. The Up per Tri as sic source rocks have the high est TR val ues (>50%) along the ba sin axis, in the area be tween bore holes Pi³a IG 1 and Piotrków Trybunalski IG 1, with the most pro nounced zone in the Kroœniewice Trough (i.e., be tween the Kroœniewice IG 1 and Budziszewice IG 1 bore holes), where the TR reached >90%. The Zechstein Main Do lo mite and Up per Tri as sic en tered the oil win dow in the Late Tri as sic to Early–Mid dle Ju ras sic, re spec tively. Hydrocarbon gen er a tion con tin ued un til the Late Cre ta ceous, and was com pleted dur ing tec tonic in ver sion of the ba sin.